Re: [PATCH 4/5] spi: lpspi: enable runtime pm for lpspi

[kbuild test robot <lkp@intel.com>]

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Hi Clark,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on spi/for-next]
[also build test ERROR on next-20181019]
[cannot apply to v4.19]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Clark-Wang/spi-lpspi-Add-slave-mode-support-for-imx7ulp/20181024-125200
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/spi/spi-fsl-lpspi.c: In function 'fsl_lpspi_transfer_one':
   drivers/spi/spi-fsl-lpspi.c:399:8: error: implicit declaration of function 'fsl_lpspi_txfifo_empty'; did you mean 'fsl_lpspi_set_cmd'? [-Werror=implicit-function-declaration]
     ret = fsl_lpspi_txfifo_empty(fsl_lpspi);
           ^~~~~~~~~~~~~~~~~~~~~~
           fsl_lpspi_set_cmd
   drivers/spi/spi-fsl-lpspi.c: In function 'fsl_lpspi_suspend':
   drivers/spi/spi-fsl-lpspi.c:622:2: error: implicit declaration of function 'pinctrl_pm_select_sleep_state' [-Werror=implicit-function-declaration]
     pinctrl_pm_select_sleep_state(dev);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/spi/spi-fsl-lpspi.c: In function 'fsl_lpspi_resume':
>> drivers/spi/spi-fsl-lpspi.c:637:2: error: implicit declaration of function 'pinctrl_pm_select_default_state' [-Werror=implicit-function-declaration]
     pinctrl_pm_select_default_state(dev);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/pinctrl_pm_select_default_state +637 drivers/spi/spi-fsl-lpspi.c

   626	
   627	static int fsl_lpspi_resume(struct device *dev)
   628	{
   629		int ret;
   630	
   631		ret = pm_runtime_force_resume(dev);
   632		if (ret) {
   633			dev_err(dev, "Error in resume: %d\n", ret);
   634			return ret;
   635		}
   636	
 > 637		pinctrl_pm_select_default_state(dev);
   638	
   639		return 0;
   640	}
   641	#endif /* CONFIG_PM_SLEEP */
   642	

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